CONSOLIDATED STATEMENTS OF EQUITY - USD ($) shares in Millions, $ in Millions	Total	Cumulative Effect, Period of Adoption, Adjustment	Cumulative Effect, Period of Adoption, Adjusted Balance	Total Coty Inc. Stockholders’ Equity	Total Coty Inc. Stockholders’ Equity Cumulative Effect, Period of Adoption, Adjustment	Total Coty Inc. Stockholders’ Equity Cumulative Effect, Period of Adoption, Adjusted Balance	Preferred Stock	Preferred Stock Cumulative Effect, Period of Adoption, Adjusted Balance	Common Stock	Common Stock Cumulative Effect, Period of Adoption, Adjusted Balance	Additional Paid-in Capital	Additional Paid-in Capital Cumulative Effect, Period of Adoption, Adjusted Balance	Accumulated Deficit	Accumulated Deficit Cumulative Effect, Period of Adoption, Adjustment	Accumulated Deficit Cumulative Effect, Period of Adoption, Adjusted Balance	Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) Cumulative Effect, Period of Adoption, Adjusted Balance	Treasury Stock	Treasury Stock Cumulative Effect, Period of Adoption, Adjusted Balance	Noncontrolling Interest	Noncontrolling Interest Cumulative Effect, Period of Adoption, Adjusted Balance
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201602Member
Beginning balance (shares) at Jun. 30, 2018							5.0	5.0	815.8	815.8								65.0	65.0
Beginning balance at Jun. 30, 2018	$ 8,855.2	$ (18.2)	$ 8,724.4	$ 8,849.7	$ (18.2)	$ 8,718.9	$ 0.0	$ 0.0	$ 8.1	$ 8.1	$ 10,750.8	$ 10,750.8	$ (626.2)	$ (18.2)	$ (757.0)	$ 158.8	$ 158.8	$ (1,441.8)	$ (1,441.8)	$ 5.5	$ 5.5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Preferred Stock (shares)							7.9
Issuance of Preferred Stock	0.8			0.8			$ 0.1				0.7
Cancellation of stock (shares)							(3.5)
Exercise of employee stock options and restricted stock units and related tax benefits (in shares)									1.0
Exercise of employee stock options and restricted stock units	5.2			5.2							5.2
Shares withheld for employee taxes	(1.4)			(1.4)							(1.4)
Share-based compensation expense	16.9			16.9							16.9
Dividends declared - Cash and Other	(347.5)			(347.5)							(347.5)
Dividends settled in Shares of Class A Common Stock (in shares)									2.4
Non-cash dividend	30.6			30.6							30.6
Dividends declared - Stock	(30.6)			(30.6)							(30.6)
Net income (loss)	(3,781.7)			(3,784.2)									(3,784.2)							2.5
Other comprehensive income (loss)	(217.5)			(217.6)												(217.6)				0.1
Distribution to noncontrolling interests, net	(1.6)																			(1.6)
Additional redeemable noncontrolling interests due to employee grants and other adjustments	(0.6)			(0.6)							(0.6)
Adjustment of redeemable noncontrolling interests to redemption value	196.4			196.4							196.4
Ending balance (shares) at Jun. 30, 2019							9.4	9.4	819.2	819.2								65.0	65.0
Ending balance at Jun. 30, 2019	4,593.4	(0.7)	4,592.7	4,586.9	(0.7)	4,586.2	$ 0.1	$ 0.1	$ 8.1	$ 8.1	10,620.5	10,620.5	(4,541.2)	(0.7)	(4,541.9)	(58.8)	(58.8)	$ (1,441.8)	$ (1,441.8)	6.5	6.5
Beginning balance, redeemable noncontrolling interest at Jun. 30, 2018	661.3		661.3
Beginning balance, convertible stock at Jun. 30, 2018	0.0		0.0
Increase (Decrease) in Redeemable Noncontrolling Interests [Roll Forward]
Net income (loss)	12.1
Distribution to noncontrolling interests, net	(26.8)
Additional redeemable noncontrolling interests due to employee grants and other adjustments and issuance of stock and issuance of Preferred Stock	1.6
Adjustment of redeemable noncontrolling interests to redemption value	(196.4)
Ending balance, redeemable noncontrolling interest at Jun. 30, 2019	451.8		451.8
Ending balance, convertible stock at Jun. 30, 2019	$ 0.0		0.0
Accounting Standards Update [Extensible List]	Accounting Standards Update 2016-13
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cancellation of stock (shares)							(7.9)
Cancellation of stock	$ (0.7)			(0.7)			$ (0.1)				(0.6)
Purchase of Class A Common Stock (shares)																		0.5
Purchase of Class A Common Stock	(4.5)			(4.5)														$ (4.5)
Issuance of Restricted Stock (in shares)									2.0
Exercise of employee stock options and restricted stock units and related tax benefits (in shares)									1.4
Exercise of employee stock options and restricted stock units	2.7			2.7							2.7
Shares withheld for employee taxes	(5.3)			(5.3)							(5.3)
Share-based compensation expense	31.8			31.8							31.8
Dividends declared - Cash and Other	(196.3)			(196.3)							(196.3)
Dividends settled in Shares of Class A Common Stock (in shares)									8.0
Non-cash dividend	89.1			89.1					$ 0.2		88.9
Dividends declared - Stock	(88.9)			(88.9)							(88.9)
Dividends Accrued - Convertible Series B Preferred Stock	(6.5)			(6.5)							(6.5)
Net income (loss)	(1,002.0)			(1,006.7)									(1,006.7)							4.7
Other comprehensive income (loss)	(397.3)			(397.4)												(397.4)				0.1
Distribution to noncontrolling interests, net	0.0
Adjustments related to the sale of business	6.2			6.2							6.2
Noncontrolling interest due to transaction (See Note 4)	212.9																			212.9
Adjustment of redeemable noncontrolling interests to redemption value	(5.1)			(5.1)							(5.1)
Ending balance (shares) at Jun. 30, 2020							1.5	1.5	830.6	830.6								65.5	65.5
Ending balance at Jun. 30, 2020	3,228.8	$ (5.7)	3,223.1	3,004.6	$ (5.7)	$ 2,998.9	$ 0.0	$ 0.0	$ 8.3	$ 8.3	10,447.4	$ 10,447.4	(5,548.6)	$ (5.7)	$ (5,554.3)	(456.2)	$ (456.2)	$ (1,446.3)	$ (1,446.3)	224.2	$ 224.2
Increase (Decrease) in Redeemable Noncontrolling Interests [Roll Forward]
Net income (loss)	(0.7)
Dividends Accrued - Convertible Series B Preferred Stock	6.5
Distribution to noncontrolling interests, net	(16.7)
Additional redeemable noncontrolling interests due to employee grants and other adjustments and issuance of stock and issuance of Preferred Stock	709.3
Adjustments related to the sale of business	(360.4)
Adjustment of redeemable noncontrolling interests to redemption value	5.1
Ending balance, redeemable noncontrolling interest at Jun. 30, 2020	79.1		79.1
Ending balance, convertible stock at Jun. 30, 2020	$ 715.8		$ 715.8
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cancellation of stock (shares)																		(0.7)
Reacquired Class A Common Stock for employee taxes (in shares)	0.1																	0.1
Exercise of employee stock options and restricted stock units and related tax benefits (in shares)									1.7
Shares withheld for employee taxes	$ (5.0)			(5.0)							(5.0)
Share-based compensation expense	27.4			27.4							27.4
Changes in dividends accrued	1.2			1.2							1.2
Dividends declared - Cash and Other	1.2
Deemed Dividends- Convertible Series B Preferred Stock	(10.5)			(10.5)							(10.5)
Dividends Accrued - Convertible Series B Preferred Stock	(67.6)			(67.6)							(67.6)
Dividends Paid- Convertible Series B Preferred Stock	(24.2)			(24.2)							(24.2)
Net income (loss)	(217.4)			(201.3)									(201.3)							(16.1)
Other comprehensive income (loss)	134.2			134.3												134.3				(0.1)
Distribution to noncontrolling interests, net	(6.5)																			(6.5)
Adjustment of redeemable noncontrolling interests to redemption value	5.2			5.2							5.2
Equity Investment contribution for share-based compensation	2.3			2.3							2.3
Ending balance (shares) at Jun. 30, 2021							1.5		832.3									66.3
Ending balance at Jun. 30, 2021	3,062.2			$ 2,860.7			$ 0.0		$ 8.3		$ 10,376.2		$ (5,755.6)			$ (321.9)		$ (1,446.3)		$ 201.5
Increase (Decrease) in Redeemable Noncontrolling Interests [Roll Forward]
Net income (loss)	12.3
Deemed Dividends- Convertible Series B Preferred Stock	10.5
Dividends Accrued - Convertible Series B Preferred Stock	67.6
Distribution to noncontrolling interests, net	(2.1)
Additional redeemable noncontrolling interests due to employee grants and other adjustments and issuance of stock and issuance of Preferred Stock	242.4
Adjustment of redeemable noncontrolling interests to redemption value	(5.2)
Ending balance, redeemable noncontrolling interest at Jun. 30, 2021	84.1
Ending balance, convertible stock at Jun. 30, 2021	$ 1,036.3